彭海军,包小倩,高学绪,乔祎,张茂才

• 1:北京科技大学新金属材料国家重点实验室

摘要(Abstract)：

采用熔体快淬法制备了成分为(Nd0.4Pr0.6)9Fe76B15和(Nd0.4Pr0.6)9Fe72Ti4B15-yCy(y=0~4)的合金薄带,研究了Ti和C含量对快淬带非晶形成、晶化过程及磁性能的影响。结果表明:Ti和C的添加极大地促进了快淬带的非晶形成能力。随C含量增加,非晶形成能力增强,当y=4时,只需要7m/s辊速就可以得到完全非晶,最佳热处理后磁性能达到:Br=0.88T,Hci=618kA/m,(BH)max=109.8kJ/m3。研究还表明,添加Ti元素可以避免(Nd0.4Pr0.6)9Fe76B15非晶晶化过程中(Nd,Pr)2Fe23B3亚稳相和(Nd,Pr)1.1Fe4B4相的生成,从而大大提高矫顽力。(Nd0.4Pr0.6)9Fe76B15合金的晶化过程为:Amorphous phase(A)→(Nd,Pr)2Fe23B3→(Nd,Pr)2Fe14B+α-Fe→(Nd,Pr)2Fe14B+(Nd,Pr)1.1Fe4B4+α-Fe。而(Nd0.4Pr0.6)9Fe72Ti4B15合金的晶化过程为:Amorhous phase(A)→α-Fe+A′→(Nd,Pr)2Fe14B+α-Fe+Fe3B。

关键词(KeyWords)： 非晶形成能力(GFA);晶化过程;纳米晶Nd-Fe-B;磁性能

Abstract:

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基金项目(Foundation):

作者(Author): 彭海军,包小倩,高学绪,乔祎,张茂才

参考文献(References)：

• [1]Hirosawa S,Kanekiyo H,Miyoshi T,et al.Structure and magnetic properties of Nd2Fe14B/FexB-type nanocomposites prepared by strip casting[J].IEEETransactions on Magnetics,2004,40:2883-2885.
• [2]Kramer M J,Li C P,Dennis K W,et al.Effect of TiC additions to the microstructure and magnetic properties of Nd9.5Fe84.5B6 melt-spun ribbons[J].Journal of Applied Physics,1998,83:6631-6633.
• [3]Branagan D J,McCallum R W.Precipitation phenomenon in stoichiometric Nd2Fe14B alloys modified with titanium and titanium with carbon[J].Journal ofAlloys and Compounds,1995,230:67-75.
• [4]张茂才,乔,王佐诚.成份及组织结构对Pr2Fe14B/-αFe纳米晶复合永磁材料晶粒间相互作用的影响[J].自然科学进展,2001,11:735-738.ZHANG Mao-cai,QIAO Yi,WANG Zuo-cheng.Effects of compositions and structures on the interactions between grains of Pr2Fe14B/-αFe nanocompositepermanent materials[J].Progress in Natural Science,2001,11:735-738.
• [5]Johnson W L.Fundamental aspects of bulk metallic glass formation in multicomponent alloys[J].Materials Science Forum,1996,225-227:35-38.
• [6]Inoue A,Zhang T.Stabilization of supercooled liquid and bulk glassy alloys in ferrous and non-ferrous systems[J].Non-Crystal Solid,1999,250-252:552-555.
• [7]Takeuchi A,Inoue A.Classification of bulk metallic glasses by atomic size difference,heat of mixing and period of constituent elements and its application tocharacterization of the main alloying element[J].Materials Transactions,2005,46(12):2817-2819.
• [8]Coehoorn R,de Mooij D B,de Waard C.Melt spun permanent magnet materials containing Fe3B as the main phase[J].Journal of Magnetism and MagneticMaterials,1989,80:101-103.
• [9]Branagan D J,McCallum R.The effects of Ti,C and TiC on the crystallization of amorphous Nd2Fe14B[J].Journal of Alloys Compounds,1996,245:15-19.
• [10]Hirosawa S,Kanekiyo H,Miyoshi T.Unusual effects of Ti and C additions on structural and magnetic properties of Nd-Fe-B nanocomposite magnets in a B-rich and Nd-poor composition range[J].Journal of Magnetism and Magnetic Materials,2004,281:58-67.

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